Delayed transmission of data packets over networks

• US 5,663,951 A
• Filed: 06/06/1995
• Issued: 09/02/1997
• Est. Priority Date: 11/24/1993
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Downing, Russell, Gates, Gregory, Danneels, Gunner
• Primary Examiner(s): BLUM, RUSSELL
• Application Number:
  US08/471,203
• Time in Patent Office: 819 Days
• Field of Search: 370/17, 370/60, 370/60.1, 370/61, 370/62, 370/94.1, 370/94.2, 370/229, 370/230, 370/231, 370/260, 370/263, 370/477, 395/200.04, 395/200.06, 395/200.13
• US Class Current: 370/230
• CPC Class Codes: G06T 1/00 General purpose image data processing
• CPC Class Codes: G06T 2200/16 involving adaptation to the client's capabilities
• CPC Class Codes: H04L 12/1813 for computer conferences, e.g. chat rooms instant messaging H04L51/04; protocols for multimedia communication H04L65/1101; arrangements for multi-party communication H04L65/403; telephonic conference arrangements H04M3/56; television conference systems H04N7/15
• CPC Class Codes: H04L 12/1822 Conducting the conference, e.g. admission, detection, selection or grouping of participants, correlating users to one or more conference sessions, prioritising transmission
• CPC Class Codes: H04M 3/567 Multimedia conference systems
• CPC Class Codes: H04M 7/006 Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04M 9/08 Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
• CPC Class Codes: H04N 21/4143 embedded in a Personal Computer [PC]
• CPC Class Codes: H04N 21/643 Communication protocols network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP], H04L65/65
• CPC Class Codes: H04N 7/147 Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q
• CPC Class Codes: H04N 7/148 Interfacing a video terminal to a particular transmission medium, e.g. ISDN
• CPC Class Codes: H04N 7/15 Conference systems
• CPC Class Codes: H04Q 2213/13003 Constructional details of switching devices
• CPC Class Codes: H04Q 2213/13103 Memory
• CPC Class Codes: H04Q 2213/13106 Microprocessor, CPU
• CPC Class Codes: H04Q 2213/13204 Protocols
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/1324 Conference call
• CPC Class Codes: H04Q 2213/13299 Bus
• CPC Class Codes: H04Q 2213/13337 Picturephone, videotelephony
• CPC Class Codes: H04Q 2213/13389 : LAN, internet

Abstract

Signals (e.g., for audio/video conferencing) are divided into data packets for transmission from a local node to a remote node. The transmission of the data packets is delayed to transmit then at intervals to avoid overloading the remote node with data packets that it does not have the bandwidth to receive and/or process. The invention helps prevent the remote node from dropping data packets which may otherwise occur when transmitting audio and/or video signals during a session (e.g., an audio/video conferencing session).

Claims

1. A computer-implemented process, comprising the steps of:

(a) generating a set of signals corresponding to a portion of a session at a local node;

(b) dividing the set of signals into a plurality of data packets;

(c) transmitting a first subset of the data packets from the local node to a remote node; and

(d) transmitting a subsequent subset of the data packets from the local node to the remote node after a delay to avoid overloading the remote node with data packets, wherein;

the local node comprises a signal-generating subsystem and a communications subsystem;

the signal-generating subsystem generates the set of signals;

the communications subsystem divides the set of signals into the data packets and transmits the first and subsequent subsets of data packets to the remote node; and

the communications subsystem;

receives a first interrupt signal;

transmits the first subset of data packets during the first interrupt time corresponding to the first interrupt signal;

receives a subsequent interrupt signal; and

transmits the subsequent subset of data packets during the subsequent interrupt time corresponding to the subsequent interrupt signal.

2. The process of claim 1, wherein step (d) is repeated until all of the data packets have been transmitted.

3. The process of claim 1, wherein the first subset of data packets comprises a single data packet.

4. The process of claim 1, wherein the set of signals corresponds to a video frame.

5. The process of claim 1, wherein the set of signals comprises audio signals.

6. The process of claim 1, wherein the signal-generating subsystem is a video subsystem that generates video signals.

7. The process of claim 1, wherein the signal-generating subsystem is an audio subsystem that generates audio signals.

8. The process of claim 1, wherein the data packets are transmitted from the local node to the remote node over a network connection.

9. The process of claim 1, wherein:

the local node comprises a video subsystem, an audio subsystem, and a communications subsystem;

the video subsystem generates video signals;

the audio subsystem generates audio signals;

the set of signals comprises one of the video signals and the audio signals;

the communications subsystem transmits the first and subsequent subsets of data packets to the remote node over a network connection; and

step (d) is repeated until all of the data packets have been transmitted.

10. An apparatus, comprising:

(a) means for generating a set of signals corresponding to a portion of a session at a local node;

(b) means for dividing the set of signals into a plurality of data packets;

(c) means for transmitting a first subset of the data packets from the local node to a remote node; and

(d) means for transmitting a subsequent subset of the data packets from the local node to the remote node after a delay to avoid overloading the remote node with data packets, wherein;

a signal-generating subsystem comprises means (a);

a communications subsystem comprises means (b), (c), and (d);

the signal-generating subsystem generates the set of signals;

the communications subsystem divides the set of signals into the data packets and transmits the first and subsequent subsets of data packets to the remote node; and

the communications subsystem;

receives a first interrupt signal;

transmits the first subset of data packets during the first interrupt time corresponding to the first interrupt signal;

receives a subsequent interrupt signal; and

transmits the subsequent subset of data packets during the subsequent interrupt time corresponding to the subsequent interrupt signal.

11. The apparatus of claim 10, wherein means (d) transmits subsequent subsets of data packets until all of the data packets have been transmitted.

12. The apparatus of claim 10, wherein the first subset of data packets comprises a single data packet.

13. The apparatus of claim 10, wherein the set of signals corresponds to a video frame.

14. The apparatus of claim 10, wherein the set of signals comprises audio signals.

15. The apparatus of claim 10, wherein the signal-generating subsystem is a video subsystem that generates video signals.

16. The apparatus of claim 10, wherein the signal-generating subsystem is an audio subsystem that generates audio signals.

17. The apparatus of claim 10, wherein the data packets are transmitted from the local node to the remote node over a network connection.

18. The apparatus of claim 10, wherein:

the local node comprises a video subsystem, an audio subsystem, and a communications subsystem;

the video subsystem and the audio subsystem comprise means (a);

the communications subsystem comprises means (b), (c), and (d);

the video subsystem generates video signals;

the audio subsystem generates audio signals;

the set of signals comprises one of the video signals and the audio signals;

the communications subsystem transmits the first and subsequent subsets of data packets to the remote node over a network connection; and

means (d) transmits subsequent subsets of data packets until all of the data packets have been transmitted.

19. An apparatus, comprising:

(a) a first signal-generating subsystem; and

(b) a communications subsystem, connected to the first signal-generating subsystem, wherein;

the first signal-generating subsystem generates a set of signals corresponding to a portion of a session at a local node;

the communication subsystem divides the set of signals into a plurality of data packets;

the communications subsystem transmits a first subset of the data packets from the local node to a remote node; and

the communications subsystem transmits a subsequent subset of the data packets from the local node to the remote node after a delay to avoid overloading the remote node with data packets, wherein the communications subsystem;

receives a first interrupt signal;

transmits the first subset of data packets during the first interrupt time corresponding to the first interrupt signal;

receives a subsequent interrupt signal; and

transmits the subsequent subset of data packets during the subsequent interrupt time corresponding to the subsequent interrupt signal.

20. The apparatus of claim 19, wherein the communications subsystem transmits additional subsets of the data packets after delays until all of the data packets have been transmitted.

21. The apparatus of claim 19, wherein the first subset of data packets comprises a single data packet.

22. The apparatus of claim 19, wherein the set of signals corresponds to a video frame.

23. The apparatus of claim 19, wherein the set of signals comprises audio signals.

24. The apparatus of claim 19, wherein the data packets are transmitted from the local node to the remote node over a network connection.

25. The apparatus of claim 19, further comprising:

an audio subsystem that generates audio signals; and

wherein;

the first signal-generating subsystem is a video subsystem that generates video signals;

the communications subsystem comprises a transport independent interface (TII) and a communications manager;

the TII provides an interface between the audio and video subsystems and the communications manager;

the communications manager provides and interface between the TII and a network communications stack;

the TII receives the audio signals from the audio subsystem and the video signals from the video subsystem; and

the communication manager divides the audio and video signals into the data packets and controls the transmission of the data packets to the network communications stack for transmission over the network connection to the remote node.

26. The apparatus of claim 19, further comprising:

an audio subsystem that generates audio signals; and

wherein;

the first signal-generating subsystem is a video subsystem that generates video signals;

the communications subsystem comprises a transport independent interface (TII) and a communications manager;

the TII provides an interface between the audio and video subsystems and the communications manager;

the communications manager provides and interface between the TII and a network communications stack;

the TII receives the audio signals from the audio subsystem and the video signals from the video subsystem;

the communication manager divides the audio and video signals into the data packets and controls the transmission of the data packets to the network communications stack for transmission over a network connection to the remote node; and

the communications subsystem transmits additional subsets of the data packets after delays until all of the data packets have been transmitted.